<?php 
if(!empty($dulieu))
    echo $this->Html->link(__('Xuất file Excel', true), array('controller' => 'zdvluyke1s', 'action' => 'indexexcel',$thoigian,$id_donvi)); ?></div>
<?php 
    echo $this->Xephang->showall($dulieu,$group,$donvis,$hanghoas);
?>